# Relationship history for MSHA mine 0800382

Current hierarchy: **C & G Holdings Ii Inc → Estech Inc → Phosphate Center**

- Valid-time bounds: inclusive, date granularity
- Null end: open-ended in the upstream history row; not independent proof of present control
- Transaction-time observation: 2026-10-13T11:19:05.459773+00:00

## Valid-time edges

- **operator_operates_mine:** Estech Inc → Phosphate Center; 1978-03-09 to 1985-06-30; source msha-controller-operator-history
- **controller_controls_mine:** Esmark Inc → Phosphate Center; 1978-03-09 to 1985-06-30; source msha-controller-operator-history
- **controller_controls_operator:** Esmark Inc → Estech Inc; 1978-03-09 to 1985-06-30; source msha-controller-operator-history
- **operator_operates_mine:** Estech Inc → Phosphate Center; 1985-07-01 to 1989-05-17; source msha-controller-operator-history
- **controller_controls_mine:** Beatrice Companies → Phosphate Center; 1985-07-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Beatrice Companies → Estech Inc; 1985-07-01 to 1989-05-17; source msha-controller-operator-history
- **operator_operates_mine:** Estech Inc → Phosphate Center; 1989-05-18 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** C & G Holdings Ii Inc → Phosphate Center; 1989-05-18 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** C & G Holdings Ii Inc → Estech Inc; 1989-05-18 to current/open; source msha-controller-operator-history